SieviAir Roller S3 size 41

An S3 protection class shoe with SieviAir® sole, BOA® Fit System, penetration-resistant steel midsole and aluminium toe cap. The FlexEnergy® component, the world’s most advanced shock-absorbing heel, stores kinetic energy and gives a greater than 55% energy return. The SieviAir® sole dissipates the perspiration created by the heat of the feet through special ducts.